Rotary cutter



March '27, 1928. 1,664,083

/ F. P. MILLER ROTARY CUTTER Filed May 16, 1925 INVENTOR 731ml Ell/17181:

AITFORNEY I r. 2 7 ;192s. v

UNITED STATES 1,664,083 PATENT OFFICE.

FRANK I. MILLER, OF MEADVILLE, PENNSYLVANIA.

onny lcumrna.

' Applicatioufiled may 16, 1925. Serial No. 80,781.

This invention relates to rotary cutters of the inserted blade type.-

An importantaim of this invention is to provide a rotary cutter in the form of a milling cutter, a reamer, or the like, having simple means whereby the inserted, detachable, work engaging elements are positively andfirmly seated and are held against ra- I I vl ter""wh1ch is. characterized by fewness of parts, simplicity of adjustment, and pracdial'or longitudinal shiftin while in use.

A. further aim is to provide a rotary cutticability in' the metal working art. r In the accompanying drawing forming a part of this application and in which like numerals are employed to designate like parts throughout the same, I

Figure 1 is a fragmentary perspectlve of a milling cutter embodying the invention;

Figure 2 is' a detail sectional view through the cutter;

Figure 3 1s a sectional view taken on line 3-3 of Figure 2; a

Figure 4 is e group perspective of a blade and the holding means therefor Figure v51 is a fragmentary side elevation- 'of.a slight modification of the invention;

Figure-adds a perspective illustrating a modified form of block, the modification consisting, in the meansto hold the wedge block against axial movement.

In the drawing, wherein for the purpose of illustration-is shown a'preferred embodiment of the invention, the numeral 5 designates a milling cutter body provided with slots 6 extending out through the periphery thereof for the reception of blades 7, wedge blocks 8, and wedge pins 9.

Figure 4 illustrates that each blade 7 is provided on one side face thereof with transverse teeth or serrations 10 adapted to Interfit with the transverse teeth or serrations 11 on thefopposed face of the tapered wedge that when it is forced outwardly 1t Wlll bind block 8. The wedge block 11 isuniforihly tapered toward the outer edge thereof so the blade securely inposition.

In carryin out the invention the opposed "sidesof the lades 7 and the wedge blocks 8 are provided with grooves 14 and 16,- respectively, which form in effect shoulders or abutments18 and 20, for engagement by the tapered wedge pins Inuse, the blades and" the wedge blocks 8 are inserted into the slots 6 with the grooves Hand 16 in opposed relation. I The tapered wedge pins 9 may be driven into the are properly presented to the wedge pin 9.

In. other words, the shoulders or abutments converge. By thus driving the blades in wardly they are firmly seated against the bottom walls of the slots 6 or against shims which may for the purpose of adjustment be placed between the inner edges of the blades and the bottom walls of the slots.

The outward movement of they tapered wedge blocks 8 will cause the wedge blocks to be firmly anchored in place in binding engagement with the blades 7 whereby the blades are not only seated firmly and flatly in engagement with the bottom walls of the slots, but are efifectivelybraced atthe opposite sides thereof to withstand the strain to which milling cutters and the like are subjected.

Particularattention is directed to Figures 1 and 2 which illustrate that one side wall of each slot 6 is provided with a transverse groove 22 extending out through the periphery ofthe body 5 for the reception of a rib 24 formed on one side of the tapered wedge block. 8. When the rib'24 is received in the groove 22 axialinovement of the wedge block 8 and the blade interlocked therewith will be positively prevented. In other words, the

rib 20 effectively transmits the end thrust on the blade to the body. w Figure 6 illustrates a modified form of taking-the end .thrust on the blade. By erence to this figure it will be seen that the ends of the wedge block 70 are provided with lugs 71 at the ends thereof, which lugs overhang the body 5 and thereby prevent endwise movement of the wedge block and the associated blade. v

A further modification of the invention is illustrated in Figure 5 wherein it is shown that the opposed surfaces of the blade 80 and the wedge block 81 are grooved as shown at 82 to define shoulders or abutments 84 against which the tapered wedge pin 86 enrefgages for forcing the tapered wedge block 81 outwardly and the blade 80 inwardly into firm seating engagement with the bottom wall of the slot, It will be seen with reference to Figure that the grooves 82 are approximately triangular in cross section and this disposes the tapered wedge pin at an angle with respect to the plane of the blade.

When the blades of the improved milling or other cutter are firmly wedged in place,

they will remain in adjustment and more by simply wedge pins and qulckly detached with the blades.

In summarizing, it will be seen that each slot 6 receives a work engaging member con- .sisting of a pair of sections, the opposed lock the sections firmly in place.

sides of which have more or less converging shoulders with whi h the tapered wedge pin 9 is engaged to force one of the sections outwardly and the other section inwardlynto e grooves which define theshoulders 18 and 20 extend out through oppositeends of the sections 7 and 8 so that the wedge pins are accessible from either side of the body for tightening or loosening.

The foregoing description and the accompanyiTg drawing illustrate that the invention is capable of a variety of mechanical expressions and is therefore to'be understood that such minor changes in construction and arrangement of parts may be made as will remain within the spirit of the invention and the scope of what is claimed and that the invention may be employed in connection with reamers, milling cutters, {c1211 holders for lathes, counterbores and the 1 e.

Having thus described the invention, what is claimed is q 1. A cutter comprising a body having a ge slot, a blade in said slot, a tapered-,we

the blade against radial and longitudinal displacement, and an axially extending ge pin between said blade and block and having means to urge the blade inwardly and the block: outwardly.

2. A cutter comprising a body having a slot, a blade in sand slot, a transversely ta-' pered wedge block in said slotand having means to urge the blade inwardly and the bloc'kxgoutwardly, said pin being tapered and being accessible from one side of the body.

3. A rotary cutter comprising a body havment with the'same to urge said blade in a one direction and the block in the other di-, rection.

4. A rotary cutter-comprising a body having a slot, a blade in said slot, a tapered wedge block in said slot, the opposed sides of said blade and said block beingprovided and r the wedge blocks 3 being provided with interfittin 'means,

slot and having means to hold means to hold the blade against radial and longitudinal displacement and a wedge pin between said blade and block and having with abutments, and a longitudinally adjustable tapered we'dge pin confined between said abutments in engagement with the same and urging the blade into firm seating engagemenfiwith the bottom wall of the slot and urging the wedge block outwardly into binding engagement with the blade.

5. A rotary cutter comprising a body having a slot, a blade in said slot, a tapered wedge block in said slot, the opposed sides of said blade and said block being provided with converging abutments, and a tapered wedge pin confined between said converging abutments in engagement with the same and urging the blade into firm seating engagement .with the bottom wall of the slot and urging the wedge block outwardly into binding engagement with the blade, the opposed sides of said blade and said wedge block being provided with inter-fitting holding means. Y 6. A rotary cutter comprising a body having a slot, a blade in said slot, a tapered wedge block in said slot, the opposed sides ofgaid blade and said block being provided A with converging abutments, and a tapered wedge pin confinedbetween said converging abutments in enga ement -with,the same and urging ment with the bottom wall of the slot and the blade into firm seating engage urging the wedge block outwardly into bindin engagement with the blade,

the op osed si es of said ,blade and said wedge look there being means associ ated wi said wedge block to holgLthe same against axial movement.

7. A cutter having a slot, a blade in'said slot, a wedge block at one side of said blade, the opposed sides of said blade and said wedge block being provided with grooves defining shoulders, and means in engagement with said shoulders to urge the blade into firm seating engagement with the bottom wall of said slot; andto urge the wedge block outwardly into firm binding engagement with said blade and the ad acent -wall of the slot, said grooves afiording easy in said grooves access to said means for tightening or loosening the same.

8. A cutter. having a slot, a blade in said slot, a wedge block at one side of said blade, the opposed sides of said blade and said Wedge block being provided with angularly extending grooves defining converging shoulders, and means in said grooves in engagement with said converging shoulders to urge the blade into firm seating engagement withthe bottom wall of said slot and to urge the wedge block outwardly into' firm binding engagement with said blade and the adjacent wall of the slot. there being means to hold said blade and said block against axial movement.

9. 'A rotary cutter comprising a body having a slot, a work engaging member in said slot and consisting of a pair of sections, the opposed sides of which have converging shoulders, and a wedge pin extending substantially parallel to the axis of the body and engaging said shoulders to urge one of the sections inwardly and the other section outwardly, said wedge pin being movable endwise and being accessible from either side of the body.

10. A rotaryv cutter comprising a body having a slot, a work engaging member in said slot and consisting of a pair of sections having shoulders, and a tapered wedge pin engaging said shoulders to urge one of the sections outwardly and the other section inwardly, one of the sections being tapered transversely.

11. A rotary cutter comprising a body having a slot, a work engaging member in said slot and consisting of a pair of sections having the opposed sides thereof provided with interfitting holding means and with converging shoulders, and a wedge pin ex- 7 tending approximately parallel to the axis of the ody and engaged with said shoulders to urge one of the sections inwardly and the other section outwardly.

12. A rotary cutter comprising a body having a slot, a blade positioned in said slot. a wedge block of tapered formation in said slot, the opposed surfaces of said blade and said block being provided with interfitting teeth and with oppositely located angularly extending grooves defining converging shoulders, a tapered wedge pin received in said grooves in engagement with said shoulders to urge the blade into firm seating engagement with the bottom wall of the slot and to urge the tapered wedge block outwardly into binding engagement with the blade and an adjacent wall of the slot, the outer wall of said wedge block and an adjacent wall of the slot being provided with interfitting locking means for holding the wedge block and the blade against axial movement, the inner wall of said wedge block being normally spaced from the bottom wall of the slot.

13. A- cutter' comprising a body having a slot, a blade and a wedge block in said slot, the opposed surfaces of said blade and said block being provided with grooves substantially triangular in cross section, and a wedge member adjustable longitudinally in said grooves and disposed at an angle with respect to the plane of the blade.

14. A rotary cutter comprising a body having a slot, a blade and a wedge block in said slot, the opposed sides of saidblade and said wedge block having abutments, one of which extends at an angle to the other, and a pin engaging said abutments and having ends accessible from the sides of the body whereby the pin may be moved endwise in both directions.

In testimony whereof I aflix my signature.

FRANK P. MILLER. 

